Don't people have savings? Don't people see what's happening in the industry and make sure to have 6+ months of savings? Don't people think that putting away a small portion of their immense tech salary would be a healthy thing to do?
I can't imagine living with only 6 months of savings. There's no guarantee that I could find another job in 6 months, and unexpected expenses (medical, car trouble, housing repairs) can easily wipe out a month of savings anyway. In fact, given that a layoff means likely also an economic downturn, finding a job at the same salary within 6 months seems highly unlikely.
I have probably 3 years of no-risk savings at this point, have managed to reduce my living expenses to the point where I could work a 40-hour minimum wage job and still pay for my expenses, and have multiple back-up careers, and I'm only now starting to feel that taking money out of savings is an acceptable risk. That took years of frugal living on a high tech salary. People in their first few years at a tech job or with families will probably never achieve that.